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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> Certificate#2460 Fax (209)384-1507 <br /> California Geophysical Client Project ID Beneto*8 Sampled See Below <br /> P O Box 578341 Reference Number 8403 Received 07-28-05 <br />' Modesto CA 95357 Sample Description Sod Extracted 08-01-05 <br /> Attn John Cussen Sample Prep/Analysis Method EPA 5030/8260 Analyzed 08-02-05 <br /> Lab Numbers 8403-1 S,2S,4S, 5S Reported 08-10-05 <br />' GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br />' ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-16-40' MW-16-50' MW-14-40' MW-14-50' <br />' - (m9/k9) _ (m9/kg) (m9/kg) (m9/kg) (m9/kg) _ <br />' Methyl tert-Butyl Ether(MTBE) 11010 ND ND ND ND <br /> Di-isopropyl Ether (DIPE) 0 010 ND ND ND ND <br />' Ethyl telt-Butyl Ether (ETBE) 0 010 ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 0 010 ND ND ND ND <br />' . tert-Butanot(TBA) 080 ND ND ND ND <br /> VOLATILE HALOCARBONS <br />' 1 2-Dichloroethane (1,2-DCA) 0 010 ND ND ND ND <br /> Ethylene Dibromide (EDB) 0 010 ND ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 1 <br /> Date Sampled 07-27-05 07-27-05 07-28-05 07-28-05 <br /> I <br />' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 605% 755% 619% 807% <br /> Toluene-d8 584% 601% 513% 660% <br />' Instrument ID HP 5972 MS <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (mglkg)= milligrams per kilogram or parts per million(ppm) <br /> APPROVED BY cf4 A A APPROVED BY <br />' Clan J Cone JaVas C Phillips <br /> Laboratory Manager boratory Director <br /> I <br />